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Date:	Tue, 9 Mar 2010 21:31:43 -0500
From:	Nick Bowler <>
Cc:	Jiri Pirko <>,
	"David S. Miller" <>
Subject: [Regression, bisected] tcpdump broken in 2.6.34-rc1

After upgrading to 2.6.34-rc1, tcpdump fails with the following message:

  tcpdump: setsockopt: Invalid argument

The issue is reproducable on two very different machines: one using
iwlagn and the other using et131x.  Bisection reveals the following and
reverting the implicated commit resolves the issue.

914c8ad2d18b62ad1420f518c0cab0b0b90ab308 is the first bad commit
commit 914c8ad2d18b62ad1420f518c0cab0b0b90ab308
Author: Jiri Pirko <>
Date:   Wed Feb 24 23:57:04 2010 +0000

    af_packet: do not accept mc address smaller then dev->addr_len in packet_mc_add()
    There is no point of accepting an address of smaller length than dev->addr_len
    here. Therefore change this for stonger check.
    Signed-off-by: Jiri Pirko <>
    Signed-off-by: David S. Miller <>

:040000 040000 e76af2835c200aea1f3b1268f5e2e7c930ece887 87d5869972605cc130372168f450ee0def0b169b M	net

git bisect start
# bad: [57d54889cd00db2752994b389ba714138652e60c] Linux 2.6.34-rc1
git bisect bad 57d54889cd00db2752994b389ba714138652e60c
# good: [baac35c4155a8aa826c70acee6553368ca5243a2] security: fix error return path in ima_inode_alloc
git bisect good baac35c4155a8aa826c70acee6553368ca5243a2
# bad: [47871889c601d8199c51a4086f77eebd77c29b0b] Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
git bisect bad 47871889c601d8199c51a4086f77eebd77c29b0b
# good: [e0d272429a34ff143bfa04ee8e29dd4eed2964c7] Merge branch 'tracing-core-for-linus' of git://
git bisect good e0d272429a34ff143bfa04ee8e29dd4eed2964c7
# good: [b3b3f04fb587ecb61b5baa6c1c5f0e666fd12d73] tg3: Update driver version to 3.107
git bisect good b3b3f04fb587ecb61b5baa6c1c5f0e666fd12d73
# good: [19bc291c99f018bd4f2c38bbf69144086dca903f] Merge branch 'master' of git://
git bisect good 19bc291c99f018bd4f2c38bbf69144086dca903f
# good: [f66ffdedbf0fc059a92219bb08c1dbcac88f074b] Merge branch 'sched-core-for-linus' of git://
git bisect good f66ffdedbf0fc059a92219bb08c1dbcac88f074b
# bad: [46976c042ba1ff59253f2f7a513099175c24794e] Merge branch 'master' of git://
git bisect bad 46976c042ba1ff59253f2f7a513099175c24794e
# bad: [b914a250e7b390c713b36a9405a39c4c11abad80] Bluetooth: Convert Marvell driver to use per adapter debugfs
git bisect bad b914a250e7b390c713b36a9405a39c4c11abad80
# good: [a4dde3abbf87a495154a876576e1ab34b17b5ef1] cnic: Use union for the status blocks of different devices.
git bisect good a4dde3abbf87a495154a876576e1ab34b17b5ef1
# bad: [738b0343e73604750feb107e063c28b3ca36cb84] Revert "ethtool: Add n-tuple string length to drvinfo and return it"
git bisect bad 738b0343e73604750feb107e063c28b3ca36cb84
# bad: [e5e26d75f490d7d41f25a4b39ed6db1713beb417] netdev: use list_first_entry macro
git bisect bad e5e26d75f490d7d41f25a4b39ed6db1713beb417
# good: [2a3f279034b46204b50408aa2c25ee0882120147] myri10ge: optimize 4k-boundary check when stocking rx pages
git bisect good 2a3f279034b46204b50408aa2c25ee0882120147
# bad: [4edb246626be6e031950205c885bdf29fb2ff1eb] rtnetlink: clean up SR-IOV config interface
git bisect bad 4edb246626be6e031950205c885bdf29fb2ff1eb
# bad: [914c8ad2d18b62ad1420f518c0cab0b0b90ab308] af_packet: do not accept mc address smaller then dev->addr_len in packet_mc_add()
git bisect bad 914c8ad2d18b62ad1420f518c0cab0b0b90ab308
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